Topic summary
Masters 1000
Extracted from the Wikipedia article ATP Masters 1000 tournaments.
The ATP Masters 1000 tournaments, also known as Masters 1000 or ATP 1000 events, are an annual series of nine tennis tournaments featuring the top-ranked players on the ATP Tour since its inception in 1990. The ATP 1000 events sit below the Grand Slam tournaments and the year-end championships in prestige on the annual ATP Tour calendar; these tournaments plus the quadrennial Summer Olympics are collectively known as the 'Big Titles'.